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The Siemens 243-0009 is a pneumatic relay used for various control functions in HVAC and industrial systems. It operates with a spring range of zero to twenty-five psi and features one eighth inch NPT air connections. The relay provides reliable performance in applications such as amplifying signals and controlling pressure levels.
Ideal for HVAC control systems where pneumatic performance is essential.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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